What was found
VAR NR CAUTION LIGHT ON AND OFF CONSTANTLY THROUGH FLIGHT. WHEN PLACED INTO MANUAL TRIM SWITCH- WOULD NOT ADJUST NR BUT WOULD DRIVE #2 FLI. PASSING THROUGH 50-55KTS THE NR WOULD NOT SEQUENCE TO THE APPROPRIATE SPEED. T/F EVALUATION: NUMBER 1 VARTOMS TRIM ACTUATOR FAILS INTERMITTENTLY CAUSING FLI NEEDLE SPLITS, TRIED SWITCHING THE NUMBER 1 CANNON PLUG TO THE NUMBER 2 CONNECTION AND TRIM MOTOR WAS STILL NOT MOVING. REPLACED #1 TRIM ACTUATOR(IPC: 76-12-01-01A-100).